Boiler feeding device



1931- NEMENYI BOILER FEEDING DEVICE Filed Dec. 19, 1925 IN V EN TOR.

BY M $4M A TTORNEYS.

Patented Oct. 6, 1931 urrso stares PAT ET LAJOS NEMENYI, OF M'GUNT VEENON, NEW YORK BOILER FEEDING nnvron Application filed Becember 19,1825. Serial No. 76,373.

sui able valve means, is left open until the flowing into the boiler reaches the I water level of theboiler and the line is closed.

Fre uently the engineer or person in charge through carelessness or with bad intent permits water to run into the boiler wl n the latter is overheated. With such ast iron boilers, the material thereof is, due to its-lack of elasticity, unable to withstand the stresses resulting from the rapid Cooling of cert parts thereof by the Water admitted and different parts are broken and become useless, thus causing great expense for repair and the inconvenience of lengthy interruptions of service.

Direct feeding, that is, through direct conetween a water supply main or line e boiler has the additional disadvantage that the hot water may, when the connection open, b forced or sucked into the 7 water pipe line. 'W hen the water pipe line and the steam boiler are directly connected and the pressure in the pipe line is less than the boiler pressure as, for example, when a pressure reduction occurs in the supply line, the hot water in the boiler will pass out of i the boiler into the supply line.

It is well known that such aspiration of hot water into the water main will cause considerable damage and consequent interruption of service. For example, the lead packings of cast iron pipes are frequently loosened and leakage occurs; the aspirated water carries impurities into the water main and affects the quality of the water for drinking purposes; and as a result of the withdrawal of the hot water from the boiler, the

boiler parts may be burned and rendered useless. 1

An object of the present invention is to provide a boiler feeding device by which such disadvantages will be obviated.

Other and more specific objects and features will be brought out in the description and'claims.

The figure illustrates an application of a preferred embodiment of the invention.

Steam passes from the boiler a through the main steam line b and the water of condensation in the system returns through the pipe cl to the" boiler where it is again changed into steam. Extending upwardly from the condenser line (Z is a pipe line 0 provided at an intermediate point with a shut-ofi' valve f, and at its upper end with a tank 9, preferably funnel-shaped and having its upper edge, as indicated in the drawing, at the mean water level of the boiler. Spaced above the upper edge of the tank 9 is a faucet it connected with a'wat-er main (not shown). Preferably the faucet h is at least four inches above the level of the upper edge of the tank 9.

reaches the mean water level thereof indicated by the filling of the funnel or tank 9. Valve f and fauceth are then closed. Inasmuch as the upper edge of the funnel g is in the plane of the mean water level of the boiler, use of the device of the present in- 35 vention prevents filling of the boiler above the mean water level and reduction of the steam space in the boiler. Furthermore, the boiler cannot be fed while it is hot, since the pressure in the feed pipe 6 up to the valve f is the same as that of the boiler, and, if the engineer or any other person attempts to feed the boiler while it is hot, he must open valve f, and the hot water at'high temperature will be forced from the feed pipe 6. In practical operation, valve f and faucet h are adapted for operation by detachable keys.

In case the engineer has failed to feedthe boiler while cool enough and the boiler is hot.

and under pressure, he must at once close the air and chimney drafts, open the furnace door so that cold air flowing into the firebox will cool the heating gases and the boiler to a sutlicient extent. Only after this is done, can the engineer without danger to himself and to the boiler, fill the latter up to the normal or mean water level.

Aspiration of the contents of the boiler into the water supply line is prevented by the gap between faucet h and funnel y. if during the feeding of the boiler the pressure in the water main is reduced for some reason, the only effect will be the aspiration of air through the open faucet h. Consequently the contents of the boiler are not affected and burning and deformation of the boiler parts are avoided.

The present invention is adapted for use not only with low pressure boilers but also with high pressure boilers, since the latter may, while cold, be filled thereby up to a certain water level without using a pump. The invention may also be used inconnection with reservoirs ortanks where it is of imporetiance to obtain or retain a certain water Feed pipe e is not necessarily connected with the condenser line but may be attached to any part of the boiler below the water level. It is understood thatthe old direct connection between the water main and the boiler must be removed, so that direct feeding of the boiler no longer takes place.

It should be understood that the present embodiment of the inventionis merely illustrative of the invention and that various changes in the apparatus could be made without departing from the true spirit of the invention.

llaving thus described my invention, 1 Claim:

1. The combination with a steam generating boiler having a water holding-chamber and arranged for operation'with a predetermined-maximum water level in said water holding chamber. of a. water supply main, and means for supplyingfeed water from said main to the lower portion of said water hol'ding chamber comprising a conduit connection extending between'said main and said boiler and havinga section arranged above and low the maximum water level to be maintained in said water holding chamber, the above mentioned section of said conduit connection having an atmospheric interruption at'a level corresponding to the predetermined maximum water level to be maintained in said water holding chamber, a control'valve in said conduit connection between said'i-nterruption and said main, and a normally closed manually operable valve between-said water holding chamber and said interruption, whereby said water holding chamber i may not be' filled withiwater above said predetermined maximum water level and whereby water may not be supplied from said main to said water holding chamber while the boiler is under pressure.

2. The combination with a steam generating boiler having a. water holding chamber and arranged for operation with a predetermined maximum Water level in said water holding chamber, of a water supply main, and means for supplying feed water from said main to the lower portion of said water holding chamber comprising a conduit connection extending between said main and said boiler and having a section arranged above and below the maximum water level to be maintained in said water holding chamber, the above mentioned section of said conduit connection having an atmospheric interruption at a level corresponding to the predetermined maximum water level to be maintained in said water holding chamber, the portion of said conduit section immediately below said interruption being formed by a vessel of greater cross-sectional area than the remaining conduit portion between said interruption and said water holding space, a control valve in said conduit connection between said interruption and said main, and a normally closed manually operable valve between said water holding chamber and said interruption, whereby said water holding chamber may not be filled with water above said predetermined maximum water level and whereby water may not be supplied to said water holding chamher from said main while the boiler is under pressure.

In testimony whereof I ailix my signature.

LAJOS NEMENYI. 

